New <b style=color:red>beta</b> release 2.1.8

### New <b style=color:red>beta</b> release 2.1.8

 - This is mostly just labeled a <b style=color:red>beta</b> release, because of some minor bugs remaining.

 - Adds a couple of new channel plugins:

     - Radionomy

     - Filtermusic

     - Dirble (added again)

 - While it removes: iCast / 8tracks

 - The new [User plugin simplifies adding new contrib/ plugins:

     - Delicast

     - PublicRadioFan

     - Compound channel mixing

     - File browser (unsupported)

     - Great Little Radio Player (CSV import)

     - Punkcast (no longer bundled)

 - The Xiph channel was extended, now provides a faster HTML extraction mode, and brings back the slow YP.XML conversion as fallback.

 - The Youtube error result was fixed, now uses only the v3 API (for the mostPopular list).

 - Add new configuration dialog group for Playlist processing.

 - Some bugfixes as usual:

     - Action/playlist extraction adds a custom JAMJSON extractor.

     - Last category restoration seems to work now, scrolls back and reselects correctly now.

     - Some Gtk3 fixes.
     - Invalid favicons did crash ST2.
     - Another fix for the search function.

 - And there's an experimental new package for Arch Linux / pacman, available as `.arch.txz` in the download section.